#-*- coding:utf-8 -*-

print("please input your height and weight")
height = input("height:")
weight = input("weight:")

BMI = weight / (height * height)
if BMI < 18.5:
    print 'you are too thin',BMI
elif BMI >= 24:
    print "you are too fat",BMI
else:
    print "you are normal",BMI